Hello,
We've integrated Zapier multiple times in past with different 3rd party APIs. We're top expert for SaaS app development and mostly SaaS require lots of automation. Automation APIs like Zapier, Convertkit and Click funnel are useful at times.
We have integrated Zapier using CLI as well as Builder. Have built custom JavaScript code steps, webhooks, Zaps for many 3rd parties namely, Google Drive, HubSpot, Active Campaign, Twilio, QuickBooks, Mail Chimp, Xero, Click funnels.
We can't message you so please reach out so we can initiate conversation. I would like to schedule a quick call before we give you accurate estimate.
Thanks,
Ashish